I have a modified wave jib , I want to add a furler and remove the forstay (will add a wire to the jib like a 14 turbo) to do this I will have to make the bridle very short (nearly horizontal) this will put a lot of preasure on the eyes so I might need a better solution, I cam thinking of fixing a plate under the eye and connecting the bridle to this via a shackle.

F1 is the original horizontal force on the bridal wire tang.F2 is the horizontal force with the new bridal wire angle.θ1 is the factory bridal wire angle, measured to a line running between the bridal wire tangs on the hulls.θ1 is the new bridal wire angle

The Upward force component will not change.

If you go from 30 deg to 5 deg (nearly horizontal) you will see your horizontal forces increase by a factor of 6.7.

If you go from 30 deg to 2.5 deg, horizontal forces will increase by a factor of 13.2

To sum up, you will likely rip out the tangs from the hulls. or break something else. I would not recommend doing this...

You would need to install a bow spreader (compression tube) to resist the higher inboard load from the shortened bridle wires. Some boats (NACRAs for example) do away with the bridle wires altogether and run an inverted dolphin striker on the bow spreader to allow the forestay to attach directly to the spreader itself. This allows the lowest possible attachment.

Bottom line, as the bridle wires shorten and get closer to horizontal, the inboard load increases exponentially and you definitely need to allow for this or you will certainly break something.

I have a spreader bar at the moment, the eyes are screwed over the spreader tangs which attach to the bar. I had assumed the bar would take all the inbound force as a compression load and the fulls would not be effected. I was more worried about the eyes.

F1 is the original horizontal force on the bridal wire tang.F2 is the horizontal force with the new bridal wire angle.θ1 is the factory bridal wire angle, measured to a line running between the bridal wire tangs on the hulls.θ1 is the new bridal wire angle

The Upward force component will not change.

If you go from 30 deg to 5 deg (nearly horizontal) you will see your horizontal forces increase by a factor of 6.7.

If you go from 30 deg to 2.5 deg, horizontal forces will increase by a factor of 13.2

To sum up, you will likely rip out the tangs from the hulls. or break something else. I would not recommend doing this...

The getaway joins the Bridles to the spreader bar to keep the distance down, but I don't think this would work on the waves bar.

srm wrote:

You would need to install a bow spreader (compression tube) to resist the higher inboard load from the shortened bridle wires. Some boats (NACRAs for example) do away with the bridle wires altogether and run an inverted dolphin striker on the bow spreader to allow the forestay to attach directly to the spreader itself. This allows the lowest possible attachment.

Bottom line, as the bridle wires shorten and get closer to horizontal, the inboard load increases exponentially and you definitely need to allow for this or you will certainly break something.